Walter smith



(No Model.)

" l W. SMITH.

Mold for Casting Air Chambers. No; 235,305. Patented Dec. 7,1880.

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N. PETERS. PNOTO-UTHOGRAPNER, WASHINGTON. D. C,

UNITED v`STATES PATENT Ormea..

WALTER SMITH, OF BROOKLYN, NEW YORK, ASSIGNOR TO J. S. AND G. F.

i SIMPSON, OF SAME PLACE.

MOLD FODR CASTING AIR-CHAMBERS.

SPECIFICATION formingpart of Letters Patent No. 235,305, dated December 7, 1880.

Application filed August 28, 1880. (No model.)

To all whom it may concern Be it known that I, WALTER SMITH, of Brooklyn, in the county ot' Kings and State of New York, have invented a certain new and useful Improvement in Molds for Casting Air- Ghambers and Other Hollow Articles, of which the following is a speciiication.

My invention relates to mold-boxes or flasks which are employed to cast air-chambers and similar hollow articles in which the sand cores are supported by brackets or bearings extending outwardly from the mold-boxor flask, for the purpose of avoiding the use of iron chaplets for supporting the cores, such chaplets being objectionable because they are retained in the articles after casting and are apt to cause leaks' therein.

My invention consists in the combination, with a horizontally-divided mold-box or ilask, of a half-bearing secured to and projecting outward from one end or side of the lower part of said mo1d-box or iiask, a pattern and a core, each having a stem or print which is fitted to said half-bearing, and a cap made separate from and entirelyindependent of the upper part of said mold-box or flask, and adapted to be secured to said half-bearing to hold the pattern or core in place before the upper part oi' said mold-box or ask is placed upon the lower part thereof.

In the accompanying drawings, Figure l represents a vertical section of a mold-box or ask embodying my invention, and having a pattern supported therein. Fig. 2 represents an end view ci such box or ask. Fig. 3 represents a plan of the lower half ot said box or ask and one-half of the pattern contained therein; and Fig. 4 represents a similar view of the lower half of the box or ask, and a central section of a core and its hollow stem or pipe arranged therein.

Similar letters of reference designate corre- L, sponding parts in all the figures.

A B designate, respectively, the lower and upper halves or parts of a mold-box or lask embodying my invention, the ends of which are shown as consisting of iron plates, while the sides are of wood, though they may also be of iron.

The two halves or parts are furnished with the ordinary lugs a, through which are inserted pins for properly centering the parts one upon the other.

O designates a long bearing projecting outwardly from one end or side-in this instance the end of the lower part, A-and which, as here shown, is formed in a bracket, C', which is cast in the Vsame piece with one of the end plates of the mold-box or iiask, though it might be made separately and rigidly bolted thereto.

The bearing C, which is really a half-bearing,`is bored out truly throughout its length, or, as here represented, at different points b, to save labor.

At the outer end of the bearing is secured, by bolts c, a cap, D, by which a round pipe or print iitted to the bearing may be securely clamped in place, and the iron end of the upper part, B, is bored out at cl, so as to fit closely upon such pipe or print and aid in clamping it immovably.

Referring to Figs. l and 3, E designates a pattern for an air-chamber, provided at one end with a projecting'stem or print, F, which is accurately fitted to the bearing O, the said pattern and stem or print being longitudinally divided, as is usual. In molding, the pattern Eis clamped in the bearing C and the sand rammed in the ordinary manner to form the exterior of the air-chamber, after which the pattern is removed. It will be observed that at the smaller end of the pattern is a print, e, which bears against the plate of the mold-box or flask and thus iixes the longitudinal position of the pattern in said box or ilask.

Referring to Fig. 4., G designates an ordinary core, composed of our and sand, and formed upon a hollow stem or pipe, H, so that the latter is exactly concentric with the axis of the core. The said stem or pipe is accurately fitted to the bearing C, and the portion within the core has in it perforations, to enable the stem or pipe to serve as a vent. At the smaller end of the core is a projection, f, which ts the impression left by the print e upon the pattern, and, bearing against the end plate, enables the core to be readily adjusted longitudinally, to give the required thickness of metal at the large or rounded end of the ssI IOO

chamber. By clamping the pipe or stem ll seeurelyin the bearing C the core is held centrally within the mold, and a uniform thickness ot' metal on all sides insured. After the two parts of the mold-box or flask are clamped securely7 together the box or flask is turned on end and the molten metal poured in through one or more pouringholes, g.

It will be observed that the half-bearing C does not interfere with laying the lower part of the mold-box or flask upside down on :t mold-board, and that, as the cap I) is entirely separate from and independent of the upper part of the mold-box or iiask, the core may bc placed in the mold and its stem rigidly secured in the bearing before the upper part of the mold-box or tlask is placed upon the lower part, thus affording provision for clearly seein g the exact position to which the core is adjusted before closing the mold-box or flask.

l am aware that it is old to support both cores and patterns in a bearingr or bearings projecting from a mold-box or flask, and 1 am also aware that such bearings have been composed of two brackets having rounded or concave faces and secured one to each part of the mold-box or flask. In this latter case the core cannot have its stem clamped in the bearing'.r for it until the two parts of the mold-box or tlask are placed together and secured, and at that time the position of the core in the mold cannot be seen.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination,with a horizontally-divided moldbox ox ilask, of a half-bearing secured to and projecting outward from the end or side of the lower part of said mold-box or flask, a pattern and a core, each having a stem or print, which is titted to said halfbearing,and a cap made separate from and entirely independent of the upper part of said mold-box or tlask and adapted to be secured to said halfbearing to hold the pattern or core in place before the upper part of said mold-box or flask is placed upon the lower part thereof, substantially as and for the purpose herein specilied.

WALTER SMITH.

Witnesses F. H. SAWTELLE, A. S. RICHEY. 

